The Asco 8025B223 Solenoid Valve is a pilot-operated, manually reset valve designed for high-capacity steam control. It features a latched closed, no voltage release configuration that keeps the line sealed when energized and opens when the coil is de-energized. Built with a brass body and PTFE disc, it withstands the thermal stress of continuous steam service while ensuring safe reset functionality.
Technical Specifications
- Valve Type: Manual Reset, Special Service Pilot, Latched Closed
- Pipe Size: 1 1/2″ NPT
- Flow Factor (Cv): 22.5
- Operating Pressure Differential:
- Steam: 5 to 125 psi
- Maximum Fluid Temperature:
- AC: 353°F (178°C)
- DC: 353°F (178°C)
- Body Material: Brass
- Seal Material: PTFE Disc with EPDM, FPM, and PTFE Seals
- Voltage Options:
- AC (60Hz): 24, 120, 240, 480V
- DC: 6, 12, 24, 120, 240V
- Watt Rating:
- AC: 20 watts
- DC: 36.2 watts
- Coil Insulation Class: F (AC), H (DC)
- Solenoid Enclosure:
- Standard: RedHat metal solenoid enclosure, Type 1 General Purpose Junction Box
- Optional: Explosionproof and Watertight, Types 3, 7(C and D), and 9
Key Features and Functionality
- Latched Closed Construction: Maintains shut-off while the coil is powered.
- Power-Off Trip Opening: Opens automatically on loss of signal.
- Steam-Ready Engineering: Built for heat-intensive operating conditions.
- High-Flow Performance: Suitable for large-scale steam pipelines.
- Manual Reset Control: Requires reset after trip for flow restoration.
Compatible Components and Related Parts
- ASCO RedHat II Coil Series
- ASCO Manual Reset Lever Kits
- ASCO Seal Kit for 8025 Series
- ASCO Explosionproof Solenoid Enclosure
Industry Applications
- Steam Distribution Loops: These open only during power failure conditions.
- Boiler Isolation Systems: Prevents reactivation without reset after trip.
- Plant Steam Headers: Maintain line seal under energized conditions.
- Industrial Thermal Equipment: Activates flow when circuit power drops.
- Manual Reset Protocols: Used where post-trip restart must be operator-driven.
Compliance and Approvals
- CSA Certified
- Meets shock and vibration per ISA S71.03C2
Installation and Operational Notes
- Suitable for vertical or horizontal mounting.
- A manual reset is required to resume operation after a trip.
- Use only with dry, saturated steam.
- Confirm valve selection meets application limits.
- Explosionproof configurations must follow conduit sealing requirements.
Series Catalog
Asco 8015/8025 Manual Reset Valves
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